there are a lot of unanswered variables with that question. like are the routes the same distance? are their any stop signs/lights on either route? my hunch is the flat road is better. fyi my jeep likes to be just below 3k rpm for best fuel economy.
2003 Rubicon, 4.0L, 5SPD, Custom 4.75" lift, 33" MT Baja Claws
1999 SE, 2.5L, 5SPD, sold it
PM me for wheeling in and around Northern Illinois